Abstract:
PRS0729A field emission cold cathode for use in vacuum tubes. A carbon velvet material is coated with a low work function cesiated salt and bonded to a cathode surface. The cathode will emit electrons when an electric field is applied. The carbon velvet material is comprised of high aspect ratio carbon fibers embedded perpendicular to a base material.
Abstract:
The present invention is directed to a nanotube coated with diamond or diamond-like carbon, a field emitter cathode comprising same, and a field emitter comprising the cathode. It is also directed to a method of preventing the evaporation of carbon from a field emitter comprising a cathode comprised of nanotubes by coating the nanotube with diamond or diamond-like carbon. In another aspect, the present invention is directed to a method of preventing the evaporation of carbon from an electron field emitter comprising a cathode comprised of nanotubes, which method comprises coating the nanotubes with diamond or diamond-like carbon.
Abstract:
A field emission device having bundles of aligned parallel carbon nanotubes on a substrate. The carbon nanotubes are oriented perpendicular to the substrate. The carbon nanotube bundles may be up to 300 microns tall, for example. The bundles of carbon nanotubes extend only from regions of the substrate patterned with a catalyst material. Preferably, the catalyst material is iron oxide. The substrate is preferably porous silicon, as this produces the highest quality, most well-aligned nanotubes. Smooth, nonporous silicon or quartz can also be used as the substrate. The method of the invention starts with forming a porous layer on a silicon substrate by electrochemical etching. Then, a thin layer of iron is deposited on the porous layer in patterned regions. The iron is then oxidized into iron oxide, and then the substrate is exposed to ethylene gas at elevated temperature. The iron oxide catalyzes the formation of bundles of aligned parallel carbon nanotubes which grow perpendicular to the substrate surface. The height of the nanotube bundles above the substrate is determined by the duration of the catalysis step. The nanotube bundles only grow from the patterned regions.
Abstract:
A stable field-emission electron source that does not suffer from a current drop even after a high-current density operation for a long time is provided. The field-emission electron source includes: a substrate; an insulating layer that is formed on the substrate and that has a plurality of openings; cathodes arranged at the respective openings in order to emit electron beams; a lead electrode formed on the insulating layer in order to control emission of electrons from the respective cathodes; and a surface-modifying layer formed on the surface of each of the cathodes emitting electrons, comprising a chemical bond between a cathode material composing the cathodes and a material different from the cathode material.
Abstract:
The invention presents a carbon ink with high electric field emission efficiency that can be applied in an inexpensive printing process suitable for mass production, an improved electron-emitting element for an image display device, and a method for manufacturing the electron-emitting element. The invention also presents an image display device with high image quality and efficiency using this electron-emitting element. The image display device includes a patterned conductor on a substrate, and electron-emitting elements made by applying, to predetermined positions of the conductor, a carbon ink made into a paste with an organic binder and a solvent, the ink comprising (i) carbon particles having a 6-membered carbon ring, and (ii) support particles for supporting the carbon particles, and firing the ink.
Abstract:
A field emission cathode device consisting of an electrically conducting material and with a narrow, rod-shaped geometry or a knife edge, to achieve a high amplification of the electric field strength is characterized in that the electron-emitting part of the field emission cathode at least partly has preferred cylindrical host molecules and/or compounds with host compounds and/or cylindrical atomic networks, possibly with end caps with diameters measuring in the nanometer range.
Abstract:
The present invention relates to a field emission device comprising an anode and a cathode, wherein said cathode includes carbon nanotubes nanotubes which have been subjected to energy, plasma, chemical, or mechanical treatment. The present invention also relates to a field emission cathode comprising carbon nanotubes which have been subject to such treatment. A method for treating the carbon nanotubes and for creating a field emission cathode is also disclosed. A field emission display device containing carbon nanotube which have been subject to such treatment is further disclosed.
Abstract:
An electron source including a nanostructured carbon electron-emitting film and an electron extraction grid spaced closely adjacent the surface of said film.
Abstract:
The present invention includes field effect transistors, field emission apparatuses, thin film transistors, and methods of forming field effect transistors. According to one embodiment, a field effect transistor includes a semiconductive layer configured to form a channel region; a pair of spaced conductively doped semiconductive regions in electrical connection with the channel region of the semiconductive layer; a gate intermediate the semiconductive regions; and a gate dielectric layer intermediate the semiconductive layer and the gate, the gate dielectric layer being configured to align the gate with the channel region of the semiconductive layer. In one aspect, chemical-mechanical polishing self-aligns the gate with the channel region. According to another aspect, a field emission device includes a transistor configured to control the emission of electrons from an emitter.
Abstract:
An electrode substrate of a flat panel display comprises a substrate, an electrode layer, a conductive layer, and a barrier layer. In this case, the electrode layer is disposed above the substrate. The conductive layer is disposed above the electrode layer. The material of the conductive layer comprises Silver (>99.5%), Silver alloy, Aluminum (>99.5%), Aluminum alloy, Copper (>99.5%) or Copper alloy. The barrier layer is disposed above the conductive layer. The material of the barrier layer comprises Titanium, Titanium alloy, Molybdenum, Chromium, Silicon, Silicon Oxide, or Titanium Oxide.